EP1820579A1 - Ein Verfahren zum Fixieren eines als Kreuzstück zwischen den Ständern eines Gerüsts dienenden Kupplungsflansches an einem Rohr der Ständer - Google Patents

Ein Verfahren zum Fixieren eines als Kreuzstück zwischen den Ständern eines Gerüsts dienenden Kupplungsflansches an einem Rohr der Ständer Download PDF

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Publication number
EP1820579A1
EP1820579A1 EP06124000A EP06124000A EP1820579A1 EP 1820579 A1 EP1820579 A1 EP 1820579A1 EP 06124000 A EP06124000 A EP 06124000A EP 06124000 A EP06124000 A EP 06124000A EP 1820579 A1 EP1820579 A1 EP 1820579A1
Authority
EP
European Patent Office
Prior art keywords
tube
flange
ring
locking
upright
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06124000A
Other languages
English (en)
French (fr)
Inventor
Alberto Sacristani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nico System Srl
Original Assignee
Nico System Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nico System Srl filed Critical Nico System Srl
Publication of EP1820579A1 publication Critical patent/EP1820579A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
    • E04G7/302—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in

Definitions

  • the object of the present invention is a method for fixing a coupling flange of the connecting crosspieces between the uprights of a scaffold to the tube of the upright itself.
  • prefabricated scaffolds are comprised of a series of vertical uprights and horizontal crosspieces structured so as to be coupled and uncoupled to/from one another in a simple and quick manner.
  • the vertical uprights are comprised of a cylindrical tube of suitable length and a plurality of coupling flanges distributed along the entire tube length.
  • the coupling flanges exhibit a central hole to be fitted on the upright tube, and are provided with a plurality of radial through slits angularly distributed for allowing the coupling of the connecting crosspieces along different directions.
  • the coupling flanges are fixed to the upright tube by welding.
  • a raw flange is inserted on the tube in a predetermined position and is welded on both sides. Tube and flange are then subject to a hot galvanisation process.
  • the welding operation besides implying considerable consumption of electric energy, requires systems for reducing noxious smokes.
  • the object of the present invention is to propose a method for fixing the flange to the upright tube which is quicker to carry out and economically more advantageous.
  • the flange is held on the tube by two locking edges or rings obtained by deformation of the tube itself.
  • the radial deformation of the tube is obtained by an axial compression of the tube itself.
  • the two locking edges or rings are advantageously obtained in a sequence, the flange being fitted on the tube after the first ring has been obtained, so as to rest thereon.
  • figure 1 shows a schematic view of a portion of tube of an upright set up for a first radial deformation
  • figure 2 shows the portion of tube after the first radial deformation
  • figure 3 shows the portion of tube with a flange assembled thereon
  • figure 4 shows the portion of tube with flange set up for a second deformation
  • figure 5 shows the end step of the second deformation
  • figure 6 shows the portion of tube with the flange finally locked thereto
  • figure 7 shows a plan view of a flange
  • figure 8 shows an elevation view of a portion of tube after the first radial deformation in an embodiment variation of the method.
  • figure 8a shows a cross section of the portion of tube of figure 8.
  • reference numerals 10 and 11 respectively indicate a portion of a tube of an upright for scaffolds and a coupling flange of the connecting crosspieces between the uprights of a scaffold suitable for being fixed to said tube.
  • Flange 11 which can for example be obtained by shearing or fusion, exhibits a central hole 12 for an assembly thereof to tube 10 and a plurality of radial through slits 13 angularly distributed for allowing the coupling of coupling crosspieces along different directions.
  • first contact surface 14 and a second contact surface 15 parallel and opposite the first one.
  • said contact surfaces are also the top and bottom surfaces of the flange. Said contact surfaces are connected by a side surface 16 that defines the height or thickness of flange 11.
  • the flange has a thickness of about 8 millimetres and a central hole 12 of diameter equal to about 50 mm, so as to be easily fitted on a standard tube having a diameter of about 48 mm.
  • the method provides for said flange 11 to be fitted on said tube 10 and for said tube to be radially deformed so as to obtain two locking edges or rings 20, 21 suitable for clamping flange 11 thereinbetween.
  • Radial deformation herein means a plastic deformation of the tube that causes a variation of its diameter in a localised cylindrical portion thereof.
  • the radial deformation of the tube is suitable for making each locking edge or ring 20, 21 engage a respective contact surface 14, 15 of flange 11.
  • said radial deformation of the tube is obtained by axial compression of the tube itself.
  • the fixing method according to the invention provides for the steps of:
  • each radial deformation of the tube is obtained by locking tube 10 with a clamp 30 defining a first shoulder 31 and axially compressing the tube from an end thereof inserted in a bush or matrix 40 defining a second shoulder 41 spaced from the first one.
  • a portion of tube 11 is locked by clamp 30.
  • An end of the tube is inserted in bush or matrix 40, so that between shoulders 31 and 41 of the clamp and of the bush there is a distance X corresponding to a free portion of tube subject to radially expand (figure 1).
  • said distance X is equal to about 21 mm.
  • the radial deformation of the tube is obtained by approaching bush or matrix 40 to clamp 30. During such axial compression, the free portion of pipe expands radially up to forming ring 20 (figure 2). Starting from a free portion of tube with 21 mm length, a ring of thickness equal to about 7 mm can be obtained.
  • flange 11 is fitted on tube 10 so as to abut against the first ring 20.
  • the end of tube 10 is inserted again into bush or matrix 40.
  • the distance between this and the clamp is greater than that defined for making the first ring 20, as it must keep into account the thickness of the first ring 20 and of flange 11.
  • distance X required for making a second ring 21 substantially equal to the first one, must be calculated starting from the second contact surface 15 of flange 11, that is, the free surface facing bush 40, since the portion of tube free to expand is that comprised between flange 11 and the second shoulder 41 of bush 40 (figure 4).
  • first ring 20 is not further compressible, and the portion of tube inside hole 12 of the flange is not radially expansible due to the presence of the flange itself (but to such extent as to occupy the central hole 12, which has a diameter slightly larger than that of the tube).
  • the force acting on bush 40 by approaching it to clamp 30 is selected so that the two locking edges or rings 20, 21 are compressed one towards the other against the respective contact surfaces of the flange so as to form an axial and angular locking of the flange to the tube.
  • a flange 11 which exhibits at least one slot or radial loop 16 communicating with the central hole 12, or in any case having a hole 12 which exhibits an asymmetry relative to the axis of flange 11.
  • the portion of tube inside said hole 12 is in fact free to radially expand inside said slit or loop 16 or in any case to the extent allowed by the asymmetry of hole 12, thus obtaining an angular locking of flange 11 to tube 10.
  • bush or matrix 40 and clamp 30 respectively exhibit at least one punch 40' and a corresponding recess 30' (dashed in figure 1) obtained in the respective shoulders 41, 31.
  • the latter is axially deformed by punch 40'.
  • the resulting ring in particular exhibits an axial projection 20' at each recess 30' in the clamp or bush.
  • Such angular locking projection 20' is then inserted in a corresponding slit 16 obtained in flange 11 when this is fitted on the tube before making the second locking ring 21.
  • the fixing method according to the invention therefore allows obtaining an upright for scaffolds wherein the coupling flange is fixed to the tube without any welding, avoiding all the operations this implies.
  • the flange can be advantageously fixed to an already galvanised tube, available on the market. A finished product is therefore obtained at the end of the process which requires no further processing.
  • the fixing method proposed can be carried out with simple equipment that comprises, for example, a tube locking clamp and a bush or matrix suitable for being moved relative to said clamp.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Clamps And Clips (AREA)
EP06124000A 2006-02-17 2006-11-14 Ein Verfahren zum Fixieren eines als Kreuzstück zwischen den Ständern eines Gerüsts dienenden Kupplungsflansches an einem Rohr der Ständer Withdrawn EP1820579A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBS20060029 ITBS20060029A1 (it) 2006-02-17 2006-02-17 Metodo di fissaggio di una flangia di aggancio dei traversi di collegamento tra i montanti di un ponteggio al tubo del montante stesso

Publications (1)

Publication Number Publication Date
EP1820579A1 true EP1820579A1 (de) 2007-08-22

Family

ID=38068880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06124000A Withdrawn EP1820579A1 (de) 2006-02-17 2006-11-14 Ein Verfahren zum Fixieren eines als Kreuzstück zwischen den Ständern eines Gerüsts dienenden Kupplungsflansches an einem Rohr der Ständer

Country Status (2)

Country Link
EP (1) EP1820579A1 (de)
IT (1) ITBS20060029A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2027951A1 (de) * 2007-08-23 2009-02-25 WAFIOS Aktiengesellschaft Verfahren zum drehfesten Verbinden eines metallischen Rohres mit einem Blech sowie drehfeste Verbindung eines metallischen Rohres mit einem Blech
EP2492028A3 (de) * 2011-02-23 2013-02-20 Welser Profile Austria GmbH Verfahren zum Aufbringen einer Rosette auf ein Rohr
NL2009987C2 (en) * 2012-12-14 2014-06-17 Scafom Holding B V Standard of a modular scaffolding system, and method for manufacturing the same.
WO2017060384A1 (en) 2015-10-08 2017-04-13 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg Assembly group of a vehicle seat comprising a tube element and an attachment part arranged thereon
US10189385B2 (en) 2015-10-08 2019-01-29 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Vehicle seat
CN110153293A (zh) * 2018-02-05 2019-08-23 苏州昶兴科技有限公司 一种座椅调高器挤凸装置及挤凸工艺
US10562422B2 (en) 2017-02-08 2020-02-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Vehicle seat

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183394A (en) * 1961-07-31 1965-05-11 Superior Tube Co Cathode sleeve with flanges crimped against ceramic disc
US3327385A (en) * 1963-01-04 1967-06-27 Harsco Corp Method of making ladders
FR2562127A1 (fr) * 1984-03-30 1985-10-04 Comabi Sa Procede d'assemblage d'elements d'echafaudage
FR2615132A1 (fr) * 1987-05-13 1988-11-18 Bouquerel Emile Procede d'assemblages par sertissage pour noeud
EP0389933A1 (de) * 1989-03-24 1990-10-03 Langer, Ruth, geb. Layher Lochscheibe für Verbindungsvorrichtungen für Gerüstelemente
FR2776605A1 (fr) * 1998-03-30 1999-10-01 Valeo Systemes Dessuyage Systeme d'essuyage comportant un palier de guidage et procedes de realisation d'un collet radial sur un palier de guidage
DE19850003A1 (de) * 1998-10-29 2000-05-04 Plettac Ag Form- und Kraftschlüssige Verbindung zwischen einem vertikalen Gerüstrohr und einer Haltevorrichtung
US20030029020A1 (en) * 2001-08-13 2003-02-13 Arvind Pradhan Method for attaching a headrest guide to a seat frame

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183394A (en) * 1961-07-31 1965-05-11 Superior Tube Co Cathode sleeve with flanges crimped against ceramic disc
US3327385A (en) * 1963-01-04 1967-06-27 Harsco Corp Method of making ladders
FR2562127A1 (fr) * 1984-03-30 1985-10-04 Comabi Sa Procede d'assemblage d'elements d'echafaudage
FR2615132A1 (fr) * 1987-05-13 1988-11-18 Bouquerel Emile Procede d'assemblages par sertissage pour noeud
EP0389933A1 (de) * 1989-03-24 1990-10-03 Langer, Ruth, geb. Layher Lochscheibe für Verbindungsvorrichtungen für Gerüstelemente
FR2776605A1 (fr) * 1998-03-30 1999-10-01 Valeo Systemes Dessuyage Systeme d'essuyage comportant un palier de guidage et procedes de realisation d'un collet radial sur un palier de guidage
DE19850003A1 (de) * 1998-10-29 2000-05-04 Plettac Ag Form- und Kraftschlüssige Verbindung zwischen einem vertikalen Gerüstrohr und einer Haltevorrichtung
US20030029020A1 (en) * 2001-08-13 2003-02-13 Arvind Pradhan Method for attaching a headrest guide to a seat frame

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2027951A1 (de) * 2007-08-23 2009-02-25 WAFIOS Aktiengesellschaft Verfahren zum drehfesten Verbinden eines metallischen Rohres mit einem Blech sowie drehfeste Verbindung eines metallischen Rohres mit einem Blech
EP2492028A3 (de) * 2011-02-23 2013-02-20 Welser Profile Austria GmbH Verfahren zum Aufbringen einer Rosette auf ein Rohr
NL2009987C2 (en) * 2012-12-14 2014-06-17 Scafom Holding B V Standard of a modular scaffolding system, and method for manufacturing the same.
WO2017060384A1 (en) 2015-10-08 2017-04-13 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg Assembly group of a vehicle seat comprising a tube element and an attachment part arranged thereon
US9701227B2 (en) 2015-10-08 2017-07-11 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft Assembly group of a vehicle seat comprising a tube element and an attachment part arranged thereon
DE112016004619T5 (de) 2015-10-08 2018-07-12 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Baugruppe eines Fahrzeugsitzes, die ein Rohrelement und ein dran angeordnetes Befestigungsteil umfasst
US10189385B2 (en) 2015-10-08 2019-01-29 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Vehicle seat
DE112016004619B4 (de) 2015-10-08 2022-06-30 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Coburg Baugruppe eines Fahrzeugsitzes, die ein Rohrelement und ein daran angeordnetes Befestigungsteil umfasst
US10562422B2 (en) 2017-02-08 2020-02-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Vehicle seat
CN110153293A (zh) * 2018-02-05 2019-08-23 苏州昶兴科技有限公司 一种座椅调高器挤凸装置及挤凸工艺

Also Published As

Publication number Publication date
ITBS20060029A1 (it) 2007-08-18

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